Simplicity 040255B Installation guide

Installation Manual

GEN12AD, GEN15AD, GEN20AD

Questions?

Help is just a moment away!

Call: Generator Helpline

877-369-9400 M-F 8-5 CT

Generator Systems

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Thank you for purchasing this quality-built Rheem / Ruud generator. We are pleased that you’ve placed your confidence in the

Rheem or Ruud brand. When operated and maintained according to the instructions in the operator’s manual, your generator

will provide many years of dependable service.

This manual contains safety information to make you aware of the hazards and risks associated with generator systems and

how to avoid them. This generator system is designed and intended only for use as an optional standby system that provides

an alternate source of electric power and to serve loads such as heating, refrigeration systems, and communication systems

that, when stopped during any power outage, could cause discomfort or inconvenience. Save these original instructions for

future reference.

This generator system requires professional installation before use. Your installer should follow the instructions completely

Where to Find Us

You never have to look far to find support and service for your generator. Consult your Yellow Pages. There are many

Rheem and Ruud authorized service dealers who provide quality service. You can also contact customer service by phone at

877-369-9400 between 8:00 AM and 5:00 PM CT.

For Future Reference

Please fill out the information below and keep with your receipt to assist in unit identification for future purchase issues.

Date of Purchase __________________________

Generator

Model Number __________________________

Model Revision __________________________

Serial Number __________________________

Engine

Model Number __________________________

Serial Number __________________________

Manufacturing Company and is used under license by Briggs &

Stratton Power Products Group, LLC.

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Table of Contents

Important Safety Instructions........................4

Installation ....................................7

Equipment Description.........................................7

Home Owner Responsibilities ...................................7

Installing Dealer/Contractor Responsibilities ........................7

Cold Weather Kit .............................................7

Unpacking Precautions ........................................7

Delivery Inspection............................................7

Installation Checklist ..........................................8

Shipment Contents............................................8

Generator Placement ..........................................9

Placement of Standby Generator to REDUCE THE RISK OF CARBON MONOXIDE

POISONING..............................................................10

Placement of Standby Generator to REDUCE THE RISK OF FIRE .......11

Examples of standby generator locations to reduce the risk of fire: .....12

Other General Location Guidelines...............................15

Electrical and Fuel Inlet Locations ...............................16

Lifting the Generator .........................................16

Access Ports ...............................................17

The Gaseous Fuel System .....................................18

Fuel Consumption ...........................................19

Fuel Pipe Sizing .............................................19

System Connectors ..........................................20

Fuel Conversion .............................................21

Generator AC Connection System ...............................22

Grounding the Generator ......................................22

Utility Circuit Connection ......................................22

Transfer Switch Communication ................................22

Fault Detection System .......................................23

System Control Panel.........................................23

Final Installation Considerations ................................24

Initial Start-up (No Load)......................................24

Engine Adjustment...........................................25

Controls ..................................... 26

Operation .................................... 26

Automatic Operation Sequence .................................26

Setting Exercise Timer ........................................26

Installation Inspection ........................................26

12000 Watt Schematic Diagram ................................28

12000 Watt Wiring Diagram ...................................29

15000 and 20000 Watt Schematic Diagram .......................30

15000 and 20000 Watt Wiring Diagram ..........................31

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Save These Instructions

WARNING Running engine gives off carbon monoxide,

an odorless, colorless, poison gas.

Breathing carbon monoxide could result

in death, serious injury, headache, fatigue,

dizziness, vomiting, confusion, seizures, nausea

or fainting.

• Operate this product ONLY outdoors in an area that will

not accumulate deadly exhaust gas.

• Keep exhaust gas away from any windows, doors,

ventilation intakes, soffit vents, crawl spaces, open garage

doors or other openings that can allow exhaust gas

to enter inside or be drawn into a potentially occupied

building or structure.

• Carbon monoxide detector(s) MUST be installed and

maintained indoors according to the manufacturer’s

instructions/recommendations. Smoke alarms cannot

detect carbon monoxide gas.

WARNING Storage batteries give off explosive

hydrogen gas during recharging.

Slightest spark will ignite hydrogen

and cause explosion, resulting

in death, serious injury and/or

property damage.

Battery electrolyte fluid contains acid and is

extremely caustic.

Contact with battery contents could cause severe

chemical burns.

A battery presents a risk of electrical shock and high short

circuit current.

• DO NOT dispose of battery in a fire. Recycle battery.

• DO NOT allow any open flame, spark, heat, or lit cigarette

during and for several minutes after charging a battery.

• DO NOT open or mutilate the battery.

• Wear protective goggles, rubber apron, rubber boots and

rubber gloves.

• Remove watches, rings, or other metal objects.

• Use tools having insulated handles.

Important Safety Instructions

SAVE THESE INSTRUCTIONS - This manual contains

important instructions that should be followed during

installation and maintenance of the generator and batteries.

Safety Symbols and Meanings

The safety alert symbol indicates a potential personal

injury hazard. A signal word (DANGER, WARNING, or

CAUTION) is used with the alert symbol to designate a

degree or level of hazard seriousness. A safety symbol

may be used to represent the type of hazard. The signal

word NOTICE is used to address practices not related to

personal injury.

DANGER indicates a hazard which, if not avoided, will

result in death or serious injury.

WARNING indicates a hazard which, if not avoided, could

result in death or serious injury.

CAUTION indicates a hazard which, if not avoided, could

result in minor or moderate injury.

NOTICE addresses practices not related to personal injury.

The manufacturer cannot possibly anticipate every possible

circumstance that might involve a hazard. The warnings in

this manual, and the tags and decals affixed to the unit are,

therefore, not all-inclusive. If you use a procedure, work

method or operating technique that the manufacturer does

not specifically recommend, you must satisfy yourself that

it is safe for you and others. You must also make sure that

the procedure, work method or operating technique that you

choose does not render the generator system unsafe.

Explosion

Fire

Electrical Shock

Rotating Parts

Hot Surface

Toxic Fumes

Chemical BurnExplosive PressureAuto Start

Lift Hazard

Read Manual

WARNING The engine exhaust from this product

contains chemicals known to the State of California to

cause cancer, birth defects, or other reproductive harm.

WARNING Certain components in this product and

related accessories contain chemicals known to the State

of California to cause cancer, birth defects, or other

reproductive harm. Wash hands after handling.

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WARNING Generator produces hazardous voltage.

Failure to properly ground generator could result

inelectrocution.

Failure to isolate generator from utility power could

result in death or serious injury to electric utility

workers due to backfeed of electrical energy.

• When using generator for backup power, notify

utility company.

• DO NOT touch bare wires or bare receptacles.

• DO NOT use generator with electrical cords which are

worn, frayed, bare or otherwise damaged.

• DO NOT handle generator or electrical cords while

standing in water, while barefoot, or while hands or

feet are wet.

• If you must work around a unit while it is operating,

stand on an insulated dry surface to reduce the risk of

a shock hazard.

• DO NOT allow unqualified persons or children to operate

or service generator.

• In case of an accident caused by electrical shock,

immediately shut down the source of electrical power and

contact the local authorities. Avoid direct contact with

the victim.

• Despite the safe design of the generator, operating this

equipment imprudently, neglecting its maintenance or

being careless could cause possible injury or death.

• Remain alert at all times while working on this equipment.

Never work on the equipment when you are physically

or mentally fatigued.

• Before performing any maintenance on the generator,

disconnect the battery cable indicated by a NEGATIVE,

NEG or (-) first. When finished, reconnect that cable last.

• After your system is installed, the generator may crank

and start without warning any time there is a power

failure. To prevent possible injury, always set the

generator’s system switch to OFF, remove the service

disconnect from the disconnect box AND remove the

15 Amp fuse BEFORE working on the equipment.

WARNING Propane and Natural Gas are extremely

flammable and explosive, which could cause

burns, fire or explosion resulting in death,

serious injury and/or property damage.

• Install the fuel supply system according to NFPA 37 and

other applicable fuel-gas codes.

• Before placing the generator into service, the fuel system

lines must be properly purged and leak tested.

• After the generator is installed, you should inspect the fuel

system periodically.

• NO leakage is permitted.

• DO NOT operate engine if smell of fuel is present or other

explosive conditions exist.

• DO NOT smoke around the generator. Wipe up any oil

spills immediately. Ensure that no combustible materials

are left in the generator compartment. Keep the area near

the generator clean and free of debris.

WARNING Hazardous Voltage - Contact with power

lines could cause electric shock or burns,

resulting in death or serious injury.

Lifting Hazard / Heavy Object - Could result

in serious injury.

• If lifting or hoisting equipment is used, DO NOT contact

any power lines.

• DO NOT lift or move generator without assistance.

• Use lifting pipes as described in Lifting the Generator.

• DO NOT lift unit by roof as damage to generator

will occur.

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WARNING Starter and other rotating parts could

entangle hands, hair, clothing, or accessories

resulting in serious injury.

• NEVER operate generator without protective housings,

covers, or guards in place.

• DO NOT wear loose clothing, jewelry or anything that

could be caught in the starter or other rotating parts.

• Tie up long hair and remove jewelry.

• Before servicing, remove 15 Amp fuse from control panel

and disconnect Negative (NEG or -) battery cable.

CAUTION Installing the 15A fuse could cause the

engine to start at any time without warning

resulting in minor or moderate injury.

• Observe that the 15 Amp fuse has been removed from the

control panel for shipping.

• DO NOT install this fuse until all plumbing and wiring has

been completed and inspected.

CAUTION Excessively high operating speeds could

result in minor injury and/or equipment damage,

Excessively low speeds impose a heavy load on generator.

• DO NOT tamper with governed speed. Generator supplies

correct rated frequency and voltage when running at

governed speed.

• DO NOT modify generator in any way.

NOTICE Improper treatment of generator could damage it

and shorten its life.

• Use generator only for intended uses.

• If you have questions about intended use, contact your

authorized dealer.

• Operate generator only on level surfaces.

• Adequate, unobstructed flow of cooling and ventilating air

is critical to correct generator operation.

• The access panels/doors must be installed whenever the

unit is running.

• DO NOT expose generator to excessive moisture, dust,

dirt, or corrosive vapors.

• Remain alert at all times while working on this equipment.

Never work on the equipment when you are physically

or mentally fatigued.

• DO NOT start engine with air cleaner or air cleaner

cover removed.

• DO NOT insert any objects through cooling slots.

• DO NOT use the generator or any of its parts as a step.

Stepping on the unit could cause stress and break parts.

This may result in dangerous operating conditions from

leaking exhaust gases, fuel leakage, oil leakage, etc.

• If connected devices overheat, turn them off and

disconnect them from generator.

Shut off generator if

- electrical output is lost;

- equipment sparks, smokes, or emits flames;

- unit vibrates excessively;

- unit makes unusual noises.

WARNING

Exhaust heat/gases could ignite combustibles

or structures resulting in death, serious

injury and/or property damage. Contact with

muffler area could cause burns resulting in

serious injury.

• DO NOT touch hot parts and AVOID hot exhaust gases.

• Allow equipment to cool before touching.

• Exhaust outlet side of weatherproof enclosure must

have at least 5 ft. (1.5 m) minimum clearance from any

structure, shurbs, trees or any kind of vegetation.

• Standby generator weatherprrof enclosure must be at

least 5 ft. (1.5 m) from windows, doors, any wall opening,

shrubs or vegetation over 12 inches (30.5 cm) in height.

• Standby generator weatherproof enclosure must have a

minimum of 5 ft. (1.5 m) overhead clearance from any

structure, overhang or trees.

• DO NOT place weatherproof enclosure under a deck or

other type of structure that may confine airflow.

• Use only flexible fuel line provided. Connect provided fuel

line to generator, DO NOT use with or substitute any other

flexible fuel line.

• Smoke detector(s) MUST be installed and maintained

indoors according to the manufacturer’s instructions/

recommendations. Carbon monoxide alarms cannot

detect smoke.

• Keep at least minimum distances shown in General

Location Guidelines to insure for proper generator cooling

and maintenance clearances.

• It is a violation of California Public Resource Code,

Section 4442, to use or operate the engine on any forest-

covered, brush-covered, or grass-covered land unless

the exhaust system is equipped with a spark arrester, as

defined in Section 4442, maintained in effective working

order. Other states or federal jurisdictions may have

similar laws.

Contact the original equipment manufacturer, retailer, or

dealer to obtain a spark arrester designed for the exhaust

system installed on this engine.

• Replacement parts must be the same and installed in the

same position as the original parts.

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Installation

Equipment Description

This product is intended for use as an optional system

which provides an alternate source of electric power and

to serve loads such as heating, refrigeration systems, and

communication systems that, when stopped during any

power outage, could cause discomfort or inconvenience.

This product does not qualify for emergency standby as

defined by NFPA 70 (NEC).

Every effort has been made to ensure that information in this

manual is accurate and current. However, we reserve the

right to change, alter, or otherwise improve the product and

this document at any time without prior notice.

Only current licensed electrical and plumbing

professionals should attempt generator system

installations. Installations must strictly comply with all

applicable codes, industry standards and regulations.

Home Owner Responsibilities

 • Readandfollowtheinstructionsgiveninthe

operator’smanual.

 • Followaregularscheduleinmaintaining,caringfor

and using your generator, as specified in the operator’s

manual.

 • Carbonmonoxidedetector(s)MUSTbeinstalledand

maintained indoors according to the manufacturer’s

instructions/recommendations. Smoke alarms cannot

detect carbon monoxide gas.

If you have questions about intended use, ask your installer

or dealer or call 877-369-9400 between 8:00 AM and

5:00PM CT.

Installing Dealer/Contractor Responsibilities

 • Readandobservethesafetyrules.

 • InstallonlyanULapprovedtransferswitchthatis

compatible with the generator.

 • Readandfollowtheinstructionsgiveninthis

installation and start-up manual.

 • Installationmuststrictlycomplywithallapplicable

codes, industry standards, laws, and regulations.

 • Allowsufficientroomonallsidesofthegeneratorfor

maintenance and servicing.

Cold Weather Kit

If operating the generator below 40°F (5°C), it is HIGHLY

RECOMMENDED that a Model 6030 Cold Weather Kit

(includes oil warmer and battery warmer) and on 15kw

and 20kw, Model 6174 Cold Weather Breather Kit (includes

engine duct) be installed. These items are available at your

local servicing dealer.

If you need more information on this matter, please call

(888) 575-8226, between 8:00 AM and 5:00 PM CT.

Unpacking Precautions

The unit is shipped bolted to its mounting pad, ready

for installation. Avoid damage from dropping, bumping,

collision, etc. Store and unpack carton with the proper side

up, as noted on the shipping carton.

Delivery Inspection

After removing the carton, carefully inspect the generator for

any damage that may have occurred during shipment.

If loss or damage is noted at time of delivery, have the

person(s) making delivery note all damage on the freight

bill and affix his signature under the consignor’s memo of

loss or damage. If loss or damage is noted after delivery,

separate the damaged materials and contact the carrier

for claim procedures. Missing or damaged parts are

notwarranted.

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Shipment Contents

The generator is supplied with:

 • Pre-attachedmountingpad

 • Fully-servicedoil/lubricatingsystem

 • Flexiblefuelhook-uphose

 • Installationandstart-upmanual

 • Operator’smanual

 • Spareaccessdoorkeys

 • Spare15AmpATO-typefuse

 • Two-pinconnectorplug

 • Ten-pinconnectorplug

 • Touchuppaint

Not Included:

 • Carbonmonoxidedetector(s)

 • Smokedetector(s)

 • Startingbattery(seepage24)

 • Connectingwireandconduit

 • Fuelsupplyvalves/plumbing

 • Crane,liftingstraps,chainsorcables

 • Two48”lengthsof1”pipe(NOTconduit)

 • Holepunchesfor16gasteel

 • Torquescrewdriver,5to50inch-poundrange

 • Voltage/frequencymeter

 • Variousspecialtoolsandequipment

Proper installation of the home generator requires the

completion of the following tasks:

Carbon Monoxide (CO) Detector

Carbon Monoxide (CO) detector in working order.

Placement

Required permits have been obtained.

Generator placed in a Carbon Monoxide (CO) safe

zone. See Placement of Standby Generator to

Reduce the Risk of Carbon Monoxide Poisoning.

Generator placed in a fire safe zone. See Placement

of Standby Generator to Reduce the Risk of Fire.

Generator placed in a water damage safe zone. See

Other General Location Guidelines.

Generator placed in a utility safe zone. See Other

General Location Guidelines.

Generator placed in a debris free zone. See Other

General Location Guidelines.

Fuel

Generator is connected to fuel source with flexible

fuel line, has no fuel leaks and conforms to local

codes. See The Gaseous Fuel System.

Proper fuel pressure has been measured with all

gas appliances operating. See The Gaseous Fuel

System.

Fuel system has been configured for the proper

fuel supply: Natural gas (NG) or liquefied petroleum

( LP). See Fuel Conversion.

Electrical

Generator neutral is connected to Automatic Transfer

Switch. See Generator AC Connection System.

Generator is grounded. See Grounding the

Generator.

Generator is connected to the transfer switch with

the specified wiring. See Utility Circuit Connection

and Transfer Switch Communication.

Generator is connected to the transfer switch with

the specified wiring. #18AWG twisted pair wiring

from the generator control panel to the transfer

switch is installed in a separate conduit from

high voltage wires unless the insulation rating on

all wiring is rated for 600V See Transfer Switch

Communication.

Dipswitches in most transfer switches must be set

to correspond to the wattage of the generator. See

Transfer Switch Operator/Installation Manual.

Operation

Cold weather kit is installed, if required. See Cold

Weather Kit.

Correct battery type is installed and fully charged.

See Final Installation Considerations.

Generator engine oil level is at full mark. See Final

Installation Considerations.

Utility was shut off to test the operation of generator

and transfer switch. Note any fault codes and make

corrections as required.

Installation Checklist

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Generator Placement

Before installing generator, consult with home owner and

convey the following requirements, which must be satisfied

before the installation is complete.

There are two equally important safety concerns in regards to

carbon monoxide poisoning and fire. There are also several

general location guidelines that must be met before the

installation in considered complete.

Exhaust Side of the Generator

A - Exhaust outlet side of weatherproof enclosure

WARNING Running engine gives off carbon monoxide,

an odorless, colorless, poison gas.

Breathing carbon monoxide could result in death

serious injury, headache, fatigue, dizziness,

vomiting, confusion, seizures, nausea or fainting.

• Operate this product ONLY outdoors in an area that wil

not accumulate deadly exhaust gas.

• Keep exhaust gas away from any windows, doors,

ventilation intakes, soffit vents, crawl spaces, open garage

doors or other openings that can allow exhaust gas

to enter inside or be drawn into a potentially occupied

building or structure.

• Carbon monoxide detector(s) MUST be installed and

maintained indoors according to the manufacturer’s

instructions/recommendations. Smoke alarms cannot

detect carbon monoxide gas.

A

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All fossil fuel burning equipment, such as standby

generators, contains carbon monoxide (CO) gas in the

engine exhaust. CO gas is odorless, colorless and tasteless

and is unlikely to be noticed until a person is overcome.

CO gas can kill you so it is required that the following is

included as part of the installation:

 • Installgeneratoroutdoorsinanareathatwillnot

accumulate deadly exhaust gas.

 • DONOTinstallgeneratorwhereexhaustgascould

accumulate and enter inside or be drawn into a

potentially occupied building or structure.

 • BylawitisrequiredinmanystatestohaveaCarbon

Monoxide (CO) detector in operating condition in

your home. Carbon monoxide detector(s) (A) MUST

be installed and maintained indoors according to the

manufacturer’s instructions / recommendations. A CO

monitor is an electric device that detects hazardous

levels of CO. When there is a buildup of CO, the

monitor will alert the occupants by flashing visual

indicator light and alarm. Smoke alarms cannot detect

CO gas.

 • Yourneighbor(s)homemaybeexposedtotheengine

exhaust from your standby generator and must be

considered when installing your standby generator.

 • Ensureexhaustgasiskeptawayfrom:

B - windows

C - doors

D - ventilation intakes

E - soffit vents

F - garage doors

G - crawl spaces or other openings that can allow

exhaust gas to enter inside or be drawn into a

potentially occupied building or structure.

Placement of Standby Generator to REDUCE THE RISK OF CARBON MONOXIDE POISONING

The arrows in the figure below point to POTENTIAL points of entry for Carbon Monoxide Gas.

A

F

C

D

B

E

G

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 • Directthestandbygeneratorexhaustawayfromor

parallel to the building or structure. DO NOT direct

the generator exhaust towards a potentially occupied

building, structure, windows, doors, ventilation intakes,

soffit vents, crawl spaces, open garage doors or other

openings where exhaust gas could accumulate and

enter inside or be drawn into potentially occupied

building or structure.

 • DONOTplacestandbygeneratorinanyareawhere

leaves or debris normally accumulates. Position

standby generator in an area where winds will carry

the exhaust gas away from any potentially occupied

building or structure.

Placement of Standby Generator to REDUCE THE

RISK OF FIRE

The National Fire Protection Association (NFPA) standard

NFPA 37 establishes criteria for minimizing the hazard

of fire during the installation and operation of stationary

combustion engines. NFPA 37 limits the spacing of an

enclosed generator from openings in walls, structures, and

combustible materials outside the enclosure.

The placement requirements provided are based on

compliance to NFPA 37 2010 section 4.1.4.

WARNING

Exhaust heat/gases could ignite combustibles

or structures resulting in death, serious injury and/

or property damage.

• Exhaust outlet side of weatherproof enclosure must

have at least 5 ft. (1.5 m) minimum clearance from any

structure, shrubs, trees or any kind of vegetation.

• Standby generator weatherproof enclosure must be at

least 5 ft. (1.5 m) from windows, doors, any wall opening,

shrubs or vegetation over 12 inches (30.5 cm) in height.

• Standby generator weatherproof enclosure must have a

minimum of 5 ft. (1.5 m) overhead clearance from any

structure, overhang or trees.

• DO NOT place weatherproof enclosure under a deck or

other type of structure that may confine airflow.

• Use only flexible fuel line provided. Connect provided fuel

line to generator, DO NOT use with or substitute any other

flexible fuel line.

• Smoke detector(s) MUST be installed and maintained

indoors according to the manufacturer’s instructions/

recommendations. Carbon monoxide alarms cannot

detect smoke.

• DO NOT place weatherproof enclosure in manner other

than shown in illustrations.

Standby

Generator

Exhaust

Gas

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Examples of standby generator locations to

reduce the risk of fire:

Legend for Generator Locations to reduce the risk of fire:

A - Standby weatherproof enclosure must be at least

5 ft. (1.5 m) from windows, doors, any wall opening,

shrubs, or vegetation over 12 inches (30.5 cm) in

height.

B - Exhaust oulet side of weatherproof enclosure must

have at least 5 ft. (1.5 m) minimum clearance from any

structure, overhang or trees.

C - Standby weatherproof enclosure must have a

minimum of 5 ft. (1.5 m) overhead clearance from any

structure, overhang, or trees.

NOTICE DO NOT place weatherproof enclosure under a deck

or other type of coverend structure that may confine airflow.

Single Combustible Structure Installation

A

Standby

Exhaust

Direction

A

B

Standby

A

Exhaust

Direction

B

5 ft. (1.5 m) min.

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Legend for Generator Locations to reduce the risk of fire:

A - Standby weatherproof enclosure must be at least

5 ft. (1.5 m) from windows, doors, any wall opening,

shrubs, or vegetation over 12 inches (30.5 cm) in

height.

B - Exhaust oulet side of weatherproof enclosure must

have at least 5 ft. (1.5 m) minimum clearance from any

structure, overhang or trees.

C - Standby weatherproof enclosure must have a

minimum of 5 ft. (1.5 m) overhead clearance from any

structure, overhang, or trees.

Dual Combustible Structure Installation

A

5 ft. (1.5 m) min.

Exhaust

Direction

Standby

B

5 ft. (1.5 m) min.

Standby

Exhaust

Direction

Exhaust

Direction

B

C

B

5 ft. (1.5 m) min.

Center of

Exhaust Panel

5 ft. (1.5 m) min.

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Single Structure Installation with Structure Having a Fire Resistance Rating of at Least 1 Hour

Legend for Generator Locations to reduce the risk of fire:

A - Standby weatherproof enclosure must be at least

5 ft. (1.5 m) from windows, doors, any wall opening,

shrubs, or vegetation over 12 inches (30.5 cm) in

height.

B - Exhaust oulet side of weatherproof enclosure must

have at least 5 ft. (1.5 m) minimum clearance from any

structure, overhang or trees.

C - Standby weatherproof enclosure must have a

minimum of 5 ft. (1.5 m) overhead clearance from any

structure, overhang, or trees.

NOTICE DO NOT place weatherproof enclosure under a deck

or other type of coverend structure that may confine airflow.

A

Exhaust

Direction

Standby

A

B

A

Standby

Exhaust

Direction

B

A

Exhaust

Direction

Standby

B

5 ft. (1.5 m) min.

2 ft. (0.6 m) min.

5 ft. (1.5 m) min.

2 ft. (0.6 m) min.

5 ft. (1.5 m) min.

3 ft. (0.9 m) min.

5 ft. (1.5 m) min.

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15

Dual Structure Installation with Structure Having a Fire Resistance Rating of at Least 1 Hour

Legend for Generator Locations to reduce the risk of fire:

A - Standby weatherproof enclosure must be at least

5 ft. (1.5 m) from windows, doors, any wall opening,

shrubs, or vegetation over 12 inches (30.5 cm) in

height.

B - Exhaust oulet side of weatherproof enclosure must

have at least 5 ft. (1.5 m) minimum clearance from any

structure, overhang or trees.

C - Standby weatherproof enclosure must have a

minimum of 5 ft. (1.5 m) overhead clearance from any

structure, overhang, or trees.

NOTICE DO NOT place weatherproof enclosure under a deck

or other type of coverend structure that may confine airflow.

Other General Location Guidelines

 • Placethestandbygeneratorinapreparedlocation

that is flat and has provisions for water drainage.

 • Installthestandbygeneratorinalocationwhere

sump pump discharge, rain gutter down spouts, roof

run-off, landscape irrigation, or water sprinklers will

not flood the unit or spray the enclosure and enter

any air inlet or outlet openings.

 • Installthestandbygeneratorwhereitwillnotaffect

or obstruct any services including covered, concealed

and underground, such as telephone, electric, fuel

(natural gas / LPG vapor), irrigation, air conditioning,

cable, septic, sewer, well and so forth.

 • Installthestandbygeneratorgeneratorwhereleaves,

grass, snow, etc. will not obstruct air inlet and outlet

openings. If prevailing winds will cause blowing or

drifting, you may need to construct a windbreak to

protect the unit.

A

Standby

Exhaust

Direction

B

A

Standby

Exhaust

Direction

B

3 ft. (0.9 m)

Standby

Exhaust

Direction

B

2 ft. (0.6 m) min.

5 ft. (1.5 m) min.

2 ft. (0.6 m) min.

5 ft. (1.5 m) min.

2 ft. (0.6 m) min.

5 ft. (1.5 m) min.

min.

2 ft. (0.6 m)

min.

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16

Electrical and Fuel Inlet Locations

The 3/4 inch N.P.T. fuel inlet connector (B) and electrical

inlet location (A) is shown here:

Lifting the Generator

The generator weighs more than 530 pounds (240 kg).

Proper tools, equipment and qualified personnel should be

used in all phases of handling and moving the generator.

Two48”lengthsof1”pipe(C), supplied by the installer, are

required to lift the generator manually. Insert pipes through

the lifting holes (D) located near the unit’s base.

Youmayalsolifttheunitusinga“hookandhoist”method

attached to the lifting pipes, provided that you use a spreader

bar to ensure that the chains or cables DO NOT touch the

generator’s roof.

After unit is in place, fill the lifting holes with the supplied

lifting hole plugs. Retouch any chipped paint with supplied

touch-up paint.

A

B

C

D

WARNING Hazardous Voltage - Contact with power

lines could cause electric shock or burns,

resulting in death or serious injury.

Lifting Hazard / Heavy Object - Could result

in serious injury.

• If lifting or hoisting equipment is used, DO NOT contact

any power lines.

• DO NOT lift or move generator without assistance.

• Use lifting pipes as described in Lifting the Generator.

• DO NOT lift unit by roof as damage to generator

will occur.

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Access Ports

The generator is equipped with an enclosure that has

several access doors, as shown. The doors are named for a

significant component located behind them, as follows:

A - Control Panel door (cover to be attached by installer)

B - Fuel Inlet Port (shown for reference)

C - Oil Drain door

D - Oil Fill door

E - Exhaust Port

The access doors must be installed whenever the unit

is running to assure proper cooling, reduce noise and for

added safety.

Each generator is shipped with a set of identical keys. These

keys fit the locks that secure the access ports.

To open access door:

1. Insert key into lock of access door handle and turn key

one quarter turn counterclockwise.

2. Grasp door’s handle and turn one quarter turn

counterclockwise to open. Remove key.

To close access door:

1. Close door and turn door’s handle one quarter

turnclockwise.

2. Insert key into lock of door handle and turn key one

quarter turn clockwise. Remove key.

B

A C

D E

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The Gaseous Fuel System

The information below is provided to assist gaseous fuel

system technicians in planning installations. In no way

should this information be interpreted to conflict with

applicable fuel gas codes. Consult with your local fuel

supplier or Fire Marshall if questions or problems arise.

TO THE INSTALLER: Consult with the generator owner(s)

and convey any technical considerations that might

affect their installation plans before applying these

general guidelines.

The following general rules apply to gaseous fuel

system piping:

 • Thepipingshouldbeofamaterialthatconformsto

federal and local codes, rigidly mounted and protected

against vibration.

 • Pipingshouldbeprotectedfromphysicaldamage

where it passes through flower beds, shrub beds, and

other cultivated areas where damage could occur.

 • Installtheflexiblesteelfuelline(B) (supplied) between

the generator fuel inlet port (A) and rigid piping to

prevent thermal expansion or contraction from causing

excessive stress on the piping material.

 • Aunion(C) or flanged connection shall be provided

downstream to permit removal of controls.

 • Amanometerportshouldbeprovided(D). When

the initial test runs are completed, the manometer

is removed and the port is plugged. The manometer

port permits temporary installation of a manometer

to ensure that the engine receives the correct fuel

pressure to operate efficiently throughout its operating

range.

 • Wheretheformationofhydratesoriceisknownto

occur, piping should be protected against freezing. The

termination of hard piping should include a sediment

trap (F) where condensate is not likely to freeze.

 • Aminimumofoneaccessible,approvedmanualshutoff

valve (E) shall be installed in the fuel supply line within

6 ft. (180 cm) of the generator.

 • Aminimum10ft.(3m)sectionofgaspipebetween

the primary fuel regulator and the generator fuel inlet

connection (acts as accumulator for high block loads).

 • Amanualfuelshut-offvalvelocatedintheinteriorof

the building.

 • Wherelocalconditionsincludeearthquake,

tornado, unstable ground, or flood hazards, special

consideration shall be given to increase strength and

flexibility of piping supports and connections.

 • Pipingmustbeifthecorrectsizetomaintainthe

required supply pressures and volume flow under

varying generator load conditions with all gas

appliances connected to the fuel system turned on and

operating.

 • Useapipesealantorjointcompoundapprovedfor

use with NG/LPG on all threaded fittings to reduce the

possibility of leakage.

 • Installedpipingmustbeproperlypurgedandleak

tested, in accordance with applicable codes and

standards.

Fuel Pressure

Both LP vapor and natural gas fuel supply pressure at the

generator’s fuel inlet port should be between the following

levels at full load with all gas appliances turned on and

operating.

 • NGis5-7”W.C.

 • LPis11-14”W.C.

Ensure that all gas line shutoff valves are OPEN and that

adequate fuel pressure is available whenever automatic

operation is desired.

Power Loss

Air density is less at high altitudes, resulting in less available

engine power. Specifically, engine power will decrease 3.5%

for each 1,000 feet (300 meters) above sea level and 1% for

each 10° F (5.6°C) above 77°F (25°C). Make sure you and

your installer consider these factors when determining total

generator load.

B

A

C

D

F

E

WARNING Propane and Natural Gas are extremely

flammable and explosive, which could cause

burns, fire or explosion resulting in death,

serious injury and/or property damage.

• LP gas is heavier than air and will settle in low areas.

• Natural gas is lighter than air and will collect in high

areas.

• The slightest spark could ignite these fuels and cause an

explosion.

• DO NOT light a cigarette or smoke.

WARNING Propane and Natural Gas are extremely

flammable and explosive, which could cause

burns, fire or explosion resulting in death,

serious injury and/or property damage.

• Before placing the generator into service, the fuel system

lines must be properly purged and leak tested.

• No leakage is permitted.

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19

Fuel Consumption

Estimated fuel supply requirements at half and full load for

natural gas and LP vapor fuels are shown below.

Natural Gas LP Vapor

1/2 Load Full Load 1/2 Load Full Load

12 kW 102 C 195 C 41 C 79 C

102,000 B 195,000 B 103,000 B 197,000 B

15 kW 126 C 242 C 56 C 108 C

126,000 B 242,000 B 140,000 B 270,000 B

20 kW N/A N/A 70.4 C 141.5 C

N/A N/A 176,825 B 353,650 B

C = Cubic feet per hour

B = BTU’s per hour

Physical Properties LP Vapor Natural

Gas

Normal Atmospheric State Gas Gas

Boiling Point (in °F):

Initial

End

-44

-259

Heating Value:

BTU per gallon (Net LHV*)

BTU per gallon (gross**)

Cubic feet (gas)

83,340

91,547

2,500

63,310

1,000

Density*** 36.39 57.75

Weight† 4.24 2.65

Octane Number:

Research

Motor

110+

97

110+

* LHV (Low Heat Value) is the more realistic rating.

** Gross heat value does not consider heat lost in the form of water

during combustion.

*** Densityisgivenin“CubicFeetofGasperGallonofLiquid”.

† Weightisgivenin“PoundsperGallonofLiquid”.

NPT 10ft 15ft 20ft 30ft 40ft 50ft 60ft 70ft 80ft 90ft 100ft

3/4” 346 293 240 192 163 145 132 120 113 106 99

1” 653 549 446 360 307 274 250 230 211 197 187

Natural Gas Pipe Size - Gas Flow chart, in cubic feet per hour, specific gravity=0.65

NPT 10ft 15ft 20ft 30ft 40ft 50ft 60ft 70ft 80ft 90ft 100ft

3/4” 277 192 158 126 107 95 87 79 74 69 65

1” 428 360 293 236 202 180 164 151 139 129 123

Liquid Propane (LP) Gas Pipe Size - Gas Flow chart, in cubic feet per hour, specific gravity=1.50

Fuel Pipe Sizing

The tables below provide the maximum capacity of pipe in cubic feet of gas per hour for gas pressures of 0.5 psi or less and a

pressure drop of 0.3 in. water column. Specific gravity of gas is shown.

Listed values compensate for a nominal amount of restriction from bends, fittings, etc. If an unusual number of fittings, bends,

or other restrictions are used, please refer to federal and local codes.

Withdrawal Rate 32° F 20° F 10° F 0° F -10° F -30° F -40° F

50 CFH 115 115 115 250 250 400 600

100 CFH 250 250 250 400 500 1000 1500

150 CFH 300 400 500 500 1000 1500 2500

200 CFH 400 500 750 1000 1200 2000 2500

300 CFH 750 1000 1500 2000 2500 4000 5000

Required Propane Tank Size

The required size of the propane tank at various temperatures when kept at least half full is shown below in the chart. Given

the gas withdrawal rate and the lowest average winter temperature, an installer can specify the required LP storage tank size.

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B

A

C

D

E

F

G

System Connectors

Except for the power output and grounding connectors, all signal wire connections are made to removable two- or ten-pin

connector plugs. Compare this illustration with your generator to familiarize yourself with the location of these important

connections. Count down to the proper pin location on the control board since visual alignment with the decal can

bemisleading:

A - Ten-pin Connector Plug

B - Fault Contacts — Use NO, COM and NC to hook up a

siren, light, etc. to alert you in case of a fault. Contacts

reverse state (NO goes to NC and vice versa) upon a

faultcondition.

C - Transfer Switch Communication — Connect to transfer

switch control board for communication interface using

18AWG copper twisted pair wire.

D - Remote LED Output — Use this to hook up the optional

remote LED. The remote LED will turn on and off in

a series of blinks if certain faults are detected in the

generator.

E - +12 Volt DC, .5 Amp Output — Internal power supply.

F - 240 Volt Utility — Use to hook up the 240V utility leads

from the transfer switch to the generator.

G - Two-pin Connector Plug

 • Forpoweroutputconnection,useminimum300volt75°C-90°Ccopperwire

of the AWG specified in this table (ref. NEC Table 310.16, 100 ft. Use National

Electric Code for correction factors and wire size calculations.):

 • ForUtilityCircuitconnectionuse#14AWGminimum300volt75°C-90°C

copperwire.

 • Fortransferswitchcommunicationuse#18AWGtwistedpairconductors,nogreaterthan200ftinlength,300volt

75°C-90°C copper wire.

 • Whenconnectingtotheconnectorplugs,fastenonlyonewiretoeachconnectorscrew.

 • Torqueconnectorplugscrewsto7in-lb(7.9Newtonmeter).

Generator Wire Size (AWG)

12 kW 8

15 kW 6

20 kW 4

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